RbCl在含水混合溶剂中热力学性质的测定和研究(298.15K)

Determination and Study on Properties of Thermodynamics of RbCl in Water Containing Mixtures at 298.15K

用一价阳离子选择性电极和氯离子选择性电极组成可逆电池，通过测定电池的电动势（Ｅ／ｍＶ），据热力学原理，引用扩展的Ｄｅｂｙｅ－Ｈüｃｋｅｌ公式，求算了ＲｂＣｌ由Ｈ２Ｏ至（Ｈ２Ｏ－ＭｅＯＨ）和（Ｈ２Ｏ－ＤＭＦ）混合溶剂的标准转移Ｇｉｂｂｓ自由能（ΔＧ°ｔ／ｋＪ·ｍｏｌ－１）及其在水和混合溶剂中的活度系数（γ±），并据离子溶剂化理论对ＲｂＣｌ的ΔＧ°ｔ和γ±某些改变规律进行了讨论．

The reversaible cells consists of the Corning monovalent cation selective electrode (M + ISE) and chloride selective electrode (Cl - ISE),nameiy namely Cl - ISE/RbCl(m),H 2O(1- x ),MeOH( x) or DMF (x) /M + ISE The standard electromotive forces ( E 0 m/mV) of the measured cells have been determined at 298.15 K,and standard Gibbs free energies of transfer ( ΔG 0 t/kJ·mol -1 ) of RbCl from H 2O to (H 2O MeOH) and (H 2O DMF) mixtures and activity coefficients ( γ ±) in the mixed solvents have been calculated and discussed on the basis of theory of solvation of electrolyte solution.